p:first-letter {
	font-size: 50px;
}



.help:before{
	
	content: '*';
	color: crimson;

}
.help:after {
	content: '[?]';
	color: blue;
	
}


/* div p:first-child{
	color: blue;
} */


/* div p:last-child{
	color: blue;
} */


/* div p 的第几个孩子，从1 开始 */
div p:nth-child(1){
	color: red;
}